酚醛树脂是通过对酚醛甲醛起反应而合成,通常用于加压木质纤维来制造中密度纤维板(MDF)和福米卡家具塑料贴面。
Bakelite resin which is produced by reacting phenol with formaldehyde is used to bind wood fibres in pressed wood such as medium-density fibreboard (MDF) and formica.
木质素结构中存在大量的甲氧基,使木质素中存在许多反应活性部位,并提高它的水溶性。
Methoxy groups are abundant on the lignin structure, giving lignin many reactive sites and promoting its water solubility.
对麦草碱木质素和木材硫酸盐木质素的氧化氨解反应进行研究。
Oxidative ammonolysis reaction of wheat soda lignin and wood kraft lignin was studied.
进行了过氧化物酶催化木质素与酚聚合反应及其动力学实验研究。
The copolymerization reaction and its kinetics of lignin and phenol with peroxidase as catalyst were researched.
对氧碱木质素进行氢解后,经基比例明显提高,更有利于提高合成高分子材料的反应活性。
After hydrogenolysis of wheat alkali-oxygen lignin, the lignin has more hydroxyl, which can easily promote the reaction activity of synthesis of macromolecular material.
纤维素和木质素在较高温度下热解,表现为第二步热解,是竞争的平行一级反应,产物分别是挥发性组分和竹炭。
The second step of bamboo pyrolysis could be considered as the pyrolysis of cellulose and lignin to volatile matter and char, and well described by a parallel first-order reaction model.
对碱法麦草制浆黑液酸法回收的木质素与丙烯酰胺接枝共聚反应进行了试验研究。
Study on the effecting factors of the graft reaction of lignin from treating paper-pulping black liquor in acidification with acrylamide was accomplished.
结果表明,预处理制浆溶出木质素的硫元素与甲氧基含量及脱木质素反应均不同于常规硫酸盐制浆。
The results indicate that the contents of sulfur and methoxyl group and the delignification process of sodium sulfide pretreatment kraft pulping are different from those of control pulping.
采用室内塑制质反应器培养方法,研究了制浆废液处理的木质素污泥对酸性土壤的改良效果。
The improving effects of acid soil with lignin- sludge from treating pulping black liquor was studied using indoor culture methods with plastic reactors.
利用反应性挤出技术,在熔融状态下BPO能有效地引发HBS木质素与苯乙烯的接枝共聚。
HBS lignin can be effectively copolymerized with styrene initiated with BPO in molten state by reactive extrusion technology.
木质素的电氧化有两种机理,一种是失去两个电子产生苯氧正离子,然后苯氧正离子与水或甲醇反应;
There are two kinds of mechanism:one is to form phenoxonium ion by the removal of two electrons.
不溶于水的高沸醇木质素通过加水沉淀的方法,从反应后的液体混合物中分离。
Water-insoluble HBS lignin was separated from the liquid reaction mixture by water precipitation.
红外光谱的结果表明:木质素与对甲酚发生了聚合反应。
Lignin and P cresol react each other from Infrared spectrum of the coploymer.
分析了采用化学和物理等方法增加碱木质素自身的反应活性的原理和可能性。
The principle and possibility of using chemical methods and physical methods for increasing the reaction activity of alkali lignin are analyzed.
第一个转变发生在较低温度范围内,可能与木质素磺酸钙的脱水和甲醛等小分子的反应相关;
The first change relating with removing of water and aldehyde took place at a lower temperature.
结果表明,耐旱性不同的自交系的叶片木质素含量对干旱胁迫的反应大不相同。
Significant difference was found in the response of leaf lignin content of inbred lines with different drought tolerance to drought stress.
本文还探讨了碱木质素壳聚糖反应膜对尿素的缓释效果和膜对漆酶的固定化效果。
This paper also discusses the reactive alkali lignin chitosan membrane's sustainably-releasing effect on urea and its fixing effects on laccase.
本文将碱木质素制成膜材料并探索膜的用途,先后制备了碱木质素壳聚糖共混膜和碱木质素壳聚糖反应膜。
This paper is to make alkali lignin membrane material and explore the usage. It has produced alkali lignin-chitosan mixed membrane and alkali lignin-chitosan blended membrane.
本文将碱木质素制成膜材料并探索膜的用途,先后制备了碱木质素壳聚糖共混膜和碱木质素壳聚糖反应膜。
This paper is to make alkali lignin membrane material and explore the usage. It has produced alkali lignin-chitosan mixed membrane and alkali lignin-chitosan blended membrane.
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